Boring-machine.



No. 757,734. 'PATENTED APR. 19, 1904.

' G. E. GADFIELD. BORING MACHINE.

APPLIOATIOI FILED JULY 17, 1903.

1m 110mm.

1m: "cams yz'rcns LO. PNfITD-LITHO. WASNINGTQN. u. c.

CHARLES E. GADFIELD,

Patented. April '19, 1904.

PATENT OFFICE.

OF W'ELLINGTON, OHIO.

BORING-MACHINE.

SPECIFICATION forming part of Letters Patent N0. 757,734,. dated. April19, 1904.

Application filedil'uly 17, 1903.

. To all whom, it Hung concern.-

Be it known that 1, CHARLES E. GADFIELD, a citizen of the United States,residing at \Vellington, in the county of Lorain and State of Ohio, haveinvented certain new andv useful Improvements in Boring-Machines, ofwhich the following is a specification.

My invention relates to improvements in boring-machines; and the primaryobject of the invention is to produce a generally improved device ofthis class which will be exceedingly simple in construction, efficientin operation, and which will be better adapted to its intended purposesthan any other device of the same class with which I am acqn-ainted.

The invention is especially designed for the use of electriciansin'installing electric lights in houses, public buildings, &c., forboring horizontal holes in the stringers beneath floors and in floorsclose to washboards, in walls,

corners, and similar places where an ordinary brace cannot be used. Itcan also be used to advantage by plumbers, gas-litters, and others forboring holes for the reception of waterpipes, gas-pipes, 8:0.

With theseends in view the invention consists in the novel constructionhereinafter described, illustrated in the accompanying drawings, andparticularly pointed out in the appended claims.

Referring to the accompanying drawings,

forming a part of this specification, Figure 1 machine made up of apiece of gas-pipe or bicycle-tubing and provided at its lower end with apart of a T-pipe 2, screwed thereto, which is adapted to receive andform a bearing forv a reversible chuck 3, mounted 1 designates the mainbody portion of the.

Serial No. 166,064. (No model.)

therein, which said chuck 3 is provided with r a central opening adaptedto receive at either of its ends the shank or head of the bit 4.

5 designates a set-screw for holding the same securely in position. Uponthe other end of this chuck 3 is secured a sleeve or shoulder 6,provided with a set-screw 7 for holding the chuck 3 in its bearing andpreventing lateral movement, and also for holding'the shank or head ofthe bit 4 in position when the'same is mounted. at this end of the chuck3.. By removing this sleeve or shoulder 6 the chuck 3 may be reversed inthe bearing 2. When it is desired to have the bit on the reverse sideopposite that upon which the handle and sprocket wheels and chain areplaced when boring overhead in side walls and similar places and whendesiring to change the tool from right-handed to lefthanded, theset-screw 5 is loosened and the bit 42 reversed and mounted in thecentral opening of the opposite side of the chuck 3 andv the set-screw 7tightened, holding the bit at firmly therein. Carriedby and mounted onthe chuck 3 is a sprocket-wheel 8, by means of which the same isrevolved, and which said sprocket wheel 8 receives its motion from asprocket- ,mounted on a sleeve 0r ferrulell, adjustably mounted on themain body portion 1, near the top portion thereof, by. means of asetscrew 12.

Secured to the sprocket-wheel 10 in any suitable manner is anoperating-crank 13, by means of which motion is transmitted to themechanism hereinbefore described.

14 designates a sleeve or ferr ule adjustably lower end thereof, bymeans of a set-screw15. Secured in said ferrule 14: is a supporting armor bar 16, designed to steady and support the tool when Working andtoaregulate the distance of the bit from'the top of the timber uponwhich said arm or bar 16 rests.

Vi hen the chuck 3 is reversed in the bearposite end of the chuck 3,when it is desired to use the machine for boring in side Walls chain 9,passing over a sprocket-Wheel 10,.

secured to the main body portion 1, near the ing 2 and when the bit a isplaced in the opv and when boring in side walls overhead and whenotherwlse desirable or necessary, the supporting arm or bar 16 isremoved or reversed, so as not to interfere with any position des1 red.

17 designates a lengthening and supporting bar adjustably mounted in themain body portion 1 by means of the set-screw 18 and having secured tothe lower portion thereof or integral therewith a bracket or base-plate19, which rests on the floor or ground when it is desired to use themachine in a vertical position when boring in side walls and for otheroverhead work. The lengthening and supporting bar 17 may be. removed, ifdesired, when not needed when used in the position shown in Fig. 1 andsimilar positions.

20 designates an auxiliary sprocket-wheel slidably and adjustablymounted on the main body portion 1 by means of a sleeve or ferrule 21,secured in any desired position by means of a set-screw 22.

Secured to the sleeve or ferrule 21 in any suitable manner or formedintegral therewith are laterally and forwardly projecting arms 23,carrying on their ends rollers 24, which take over the outside of thesprocket-chain 9, holding the same in proper position and preventingsaid sprocket-chain 9 from jumping off of the sprockets of thesprocket-wheel 20 when the operating-crank 13 is secured thereto, asshown in Fig. 3 of the drawings.

It will thus be seen that when it is desired, by reason of certainpositions in which it is desired to use the tool, to apply the source ofpower at a certain position along the main body portion 1 ofthe. toolthe operatingcrank 13 is removed from the sprocket-wheel 10 and attachedto the auxiliary sprocketwheel 20, as shown in Fig. 3, and the same maybe adjusted to any desired position by means of the sliding sleeve orferrule 21 and set-screw 22, hereinbefore described.

From the foregoing description, taken in connection with theaccompanying drawings, the operation and advantages of my invention willbe readily understood.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principles orsacrificing any of the advantages of this invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. A boring-machine, consisting of a main body portion provided at itsbase end with a suitable bearing, a chuck mounted in said bearing, asprocket wheel carried by and mounted on said chuck, a sleeve orshoulder secured to said chuck, an adjustable sleeve or ferrule securedto said main body portion, a sprocketwheel mounted thereon and adaptedto carry an operating-crank, an auxiliary sleeve or ferrule slidably andadjustably mounted on said main body portion, an auxiliary sprocketwheelmounted thereon and adapted to carry said operating-crank, and asprocket-chain passing over said sprocket-wheels whereby motion istransmitted to said chuck.

2. In a boringmachine, the combination with the main body portionprovided at its lower end with a suitable bearing, a chuck mounted insaid bearing, a sprocket-wheel mounted on said chuck, a sleeve orshoulder secured to said chuck, and an adjustable sleeve or ferrulesecured to said main body portion and carrying a supporting-bar; of asecond adjustable sleeve or ferrule secured to said main body portion, asprocket-wheel mounted thereon, an operating-crank secured to saidsprocketwheel, and a sprocket-chain passing over said sprocket wheelswhereby motion is transmitted to said chuck.

3. In a boring-machine, the combination with the main body portionprovided at its lower end with a suitable bearing, a chuck mounted insaid bearing and provided with a sprocket-wheel, a second adjustablesleeve or ferrule secured to said main body portion and carrying asprocket-wheel, and a sprocketchain passing over said sprocket-wheels;of athird or auxiliary sleeve or ferrule, carrying an auxiliarysprocket-wheel, slidably and ad justably mounted on said main bodyportion, an operating-crank secured to said auxiliary sprocket-wheel,and arms projecting from said auxiliary sleeve or ferrule and carryingrollers which take over the outside of the sprocketchain to hold thesame in contact with the sprocket-wheel.

4. In a boring-machine, the combination with the main body portionprovided at its lower end with a suitable bearing, a chuck mounted insaid bearing and provided with a sprocket-wheel, an adjustable sleeve orferrule secured to said main body portion and carrying a sprocket-wheel,and a sprocket-chain passing over said sprocket-wheels; of a sleeve orferrule slidably and adjustably mounted on said main body portion, andan auxiliarysprocket-wheel mounted on said sleeve or ferrule andprovided with an operating-crank.

In testimony whereof I have affixed my signature in presence of twowitnesses.

CHARLES E. GADFIELD.

Witnesses:

J. T. HASKELL, R. HATHAWAY.

